No sound from ChucK on Ubuntu Gutsy Gibbon

ilSignorCarlo · Joined: Sep 17, 2007 Posts: 21 Location: Bologna

Hi,
I installed ChucK on Ubuntu Gutsy Gibbon, and it seems to work. I mean, I can run the example files, but I can't hear any sound (and yes, I have speakers turned on Razz

)

On the mailing list someone told me to try the command chuck --probe, and I get this

Kassen · Posted: Mon Mar 17, 2008 11:30 am Post subject:

Really weird.

Let's check something really basic. Does this perhaps give a sound?

ilSignorCarlo · Joined: Sep 17, 2007 Posts: 21 Location: Bologna

Kassen · Posted: Mon Mar 17, 2008 11:53 am Post subject:

Ok, Hmmm, just noticed your --probe report doesn't list any outputs. are you able to get sound from another program that does use the same soundsystem/drivers?

ilSignorCarlo · Joined: Sep 17, 2007 Posts: 21 Location: Bologna

Kassen · Posted: Mon Mar 17, 2008 5:38 pm Post subject:

Frostburn · Posted: Tue Mar 18, 2008 12:30 am Post subject:

Are you sure you're not running any other sound programs that could mess up with the connection to chuck? If you're running JACK (recommended) make sure that the samplerates are compatible. Chuck has a default srate of 48000.

kijjaz · Posted: Tue Mar 18, 2008 12:49 am Post subject:

Usually, if i'm using an onboard soundcard, it'd be the first dac listed in the probe.
but it depends .. anyway.

That output = 0 i see in the first probe here is like when i have another programming using the soundcard
(for example, a web browser!)

so usually, i try to exit all the programs before probing.
- - -

Another question:
are you using ChucK from the debian repository or compile chuck on Ubuntu?
i guess that one you're using is chuck compiled for ALSA support.

ilSignorCarlo · Joined: Sep 17, 2007 Posts: 21 Location: Bologna

kijjaz · Posted: Tue Mar 18, 2008 7:06 am Post subject:

1. Ok, there was a paused video in the browser window.
So... shall I close everything, or does exist some setting to play both things?

kijjaz: a paused video? that'd be the case. so closing the browser (maybe the whole browser, not just that window) to let the soundcard be available.
some setting to play both things? hmm eh i'm not sure about the new tools like PulseAudio. I'll go into that someday.

But!! .. If you're working with Jack .. That would allow playing from multiple softwares in its natural way.
(only if the softwares support jack.. I think a usual web browser doesn't support jack)

2. I'm using chuck compiled for ALSA. Which one is better?

kijjaz: Actually, I recommend having both ALSA and JACK version ready.
i usually compile for ALSA and put the result in /usr/bin
and compile for JACK and add -jack to the file name and also put in /usr/bin
so I can select between the one I want to use.

3. Why is it recommended whit JACK?

With also, chuck/miniAudicle works fine: producing audio, processing other kinds of things MIDI OSC etc..
but there're many good things with using with Jack here..
- If JACK runs smoothly, chuck/miniAudicle with jack support can run smoothly also..
- you can do more things by connecting Audio or MIDI between softwares that support Jack.

The second feature is what's very fun about using Jack with chuck..
coz you can do like.. redirecting audio signals.. (even feedback chuck's output into its input..)
record the result in another program (for example, Audacity, Rosegarden..)
do an analysis (for example, view in an oscilloscope, or see volumn meterbridge)
put through effects..
redirect MIDI between programs.. (also between USB MIDI Interfaces)
etc..

So it's gonna be more fun and you can worry less.
That depends on the latency and the stablility of your Jack running on your machine also.

Have you got a realtime kernel and tried running Jack with realtime yet?
If not, i'll try to collect all the information needed to install and config for that in Ubuntu Gutsy easily.
I'm usually on Ubuntu Gutsy and running realtime Jack on it also.

ilSignorCarlo · Joined: Sep 17, 2007 Posts: 21 Location: Bologna

kijjaz · Posted: Tue Mar 18, 2008 9:57 am Post subject:

This is my recommendation for use in Ubuntu Gutsy:

1. install a realtime kernel.
by installing these packages (and some other packages i recommend having it ready for future use):
linut-image-rt linux-headers-rt linux-restricted-modules-rt linux-backports-modules-rt
If you don't need the hears, restricted modules, backports modules, you can just install the image.

2. enable realtime.
I recommend an easy way.. but it involves installing packages from UbuntuStudio:
install this: ubuntustudio-default-settings
This will help configure. It will also give normal users permission to use realtime .. so we'll be able to use jack with realtime.

3. install qjackctl. this is GUI for running jackd, so it'd be more convenient.
you can go into 'Setup' and set different things.
Select driver to use (for example, ALSA..) and select from different soundcards.
Some firewire audio interfaces are also supported by freebob. see http://freebob.sourceforge.net/forums.html/Main_Page
- - -

after getting the realtime-enabled kernel, done giving permission to use realtime, you can try qjackctl and set Realtime and see if it works.
Sometime it just does't work, I don't know why..
Changing some values might help.

Enjoy Jack & ChucK hehheheh.. ^_^

ilSignorCarlo · Joined: Sep 17, 2007 Posts: 21 Location: Bologna

Everything works now, wow Very Happy

I still don't know about real-time, but I'll try something as soon as possibile.

Thanks a lot, bye.

kijjaz · Posted: Wed Mar 19, 2008 3:45 pm Post subject:

Although you can't have the realtime feature yet,
it can normally run qiute smoothly on modern machines.

Enjoy using Jack!! hehheh.

I recommend looking into these nice softwares that support Jack also:
Audacity, hydrogen, jackeq, jack-rack, jamin, meterbridge, puredata, rosegarden.
There are also many more I still haven't tried out and couldn't comment.